Add waiting system application files

- Add main application files (main.py, models.py, schemas.py, etc.)
- Add routers for all features (waiting, attendance, members, etc.)
- Add HTML templates for admin and user interfaces
- Add migration scripts and utility files
- Add Docker configuration
- Add documentation files
- Add .gitignore to exclude database and cache files

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

migrate_add_business_day_start.py

@@ -0,0 +1,28 @@
+import sqlite3
+
+def migrate():
+    conn = sqlite3.connect('waiting_system.db')
+    cursor = conn.cursor()
+    
+    try:
+        # Check if column exists
+        cursor.execute("PRAGMA table_info(store_settings)")
+        columns = [column[1] for column in cursor.fetchall()]
+        
+        if 'business_day_start' not in columns:
+            print("Adding business_day_start column to store_settings table...")
+            # 기본값 5 (05:00)
+            cursor.execute("ALTER TABLE store_settings ADD COLUMN business_day_start INTEGER DEFAULT 5")
+            conn.commit()
+            print("Successfully added business_day_start column.")
+        else:
+            print("business_day_start column already exists.")
+            
+    except Exception as e:
+        print(f"An error occurred: {e}")
+        conn.rollback()
+    finally:
+        conn.close()
+
+if __name__ == "__main__":
+    migrate()